Orthogonius macrophthalmus Tian & Deuve, 2013 Holotype
Female adult
“I.R.Sc.N.B / Vietnam: Pia-Oac Mt., 22.36N/ 105.53E; pine forest (light trap), 03–VIII–2010; I.G.31.668, leg. J. Constant & P. Limbourg” (IRSNB).
Image from original description.
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Orthogonius euthyphallus euthyphallus s.str. Paratype
Male adult
Image from original description.
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Orthogonius alternans (Wiedemann, 1823)
Male adult
Laos, Hua Phan prov., 6-18.5.2004 Ban Saluei, Phu Phan Mt., 1300-2000m.
Copyright © Erich Kirschenhofer

Orthogonius mouhoti Chaudoir, 1871
Male adult
Laos, Vientiane prov., Lao Pako env., 200 m, 55 km NE Vientiane, 19-22.5.2004
Copyright © Erich Kirschenhofer

Orthogonius alternans (Wiedemann, 1823)
Male adult
NE Laos Phu Phan. 17 mm; det. Anichtchenko A. 2020
Copyright © Alexander Anichtchenko

Orthogonius pectinatus Tian & Deuve, 2016 Holotype
Male adult
Vietnam: [S. Vietnam, Nam Cat Tien Nat. Park, 1-15.V.1994, Pacholatko & Dembicky/Mus. Wien/Orthogonius lieftincki Andrewes, det. Kirschenhofer, 2006] (NHMV).
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Orthogonius punctum Tian & Deuve, 2016 Holotype
Male adult
Coll. I.R.Sc.N.B./Vietnam: Dong Nai Biosphere Res.; 11°18’N, 107°06’E 25.VI.-6.VII.2012, night collecting Leg. J. Constant & J. Bresseel I.G. 32.161] (RBINS).
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Orthogonius punctum Tian & Deuve, 2016 Paratype
Male adult
S. Thailand, Phang-nga Prov. Takuapa Distr., vic. Khao Lak, 40-80 m, 03-16.VII.2012, 08°37’N/98°15’E, leg. A. Weigel
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Orthogonius picipennis Chaudoir, 1871 Holotype
Male adult
Cambodia: [picipennis Chaud./ Cambodje, Mouhot] (MNHN).
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Orthogonius nigripes Tian & Deuve, 2001
Male adult
Coll. I.R.Sc.N.B/Vietnam, Cuc Phuong N. P., 20.1900 N/105.3630 E; 19-23.VII.2011, night collecting, leg. J. Constant & J. Bresseel, I. G. 31.933 (RBINS).
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Orthogonius angustus Chaudoir, 1871
Male adult
Coll. I.R.Sc.N.B./Vietnam: Dong Nai Biosphere Res.; 11°18’ N, 107°06’ E 25.VI.- 6.VII.2012, night collecting, Leg. J. Constant & J. Bresseel/I.G. 32.161 (RBINS)
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Orthogonius pseudocheni Tian & Deuve, 2006
Male adult
Vietnam: [Coll. I.R.Sc.N.B./Vietnam, Ninh Thuan Prov., Phuoc Binh N.P., 12º04’ N/108º45’ E, 26.VII-1.VIII. 2015, light trap, Leg. J. Constant & J. Bresseel, GTI Project, I.G.: 32.779 (RBINS)
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Orthogonius macrophthalmus Tian & Deuve, 2013
Male adult
Vietnam: I.R.Sc.N.B Vietnam: Tam Dao N.P., 21.31 N/105.33 E; 25- 30.VII.2011, Malaise trap, leg. J. Constant & J. Bresseel, I.G. 31.933 GTI project (RBINS)
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Orthogonius mouhoti Chaudoir, 1871 Holotype
Male adult
coll. Chaudoir (MNHN)
Copyright © Erich Kirschenhofer

Orthogonius puncticollis
Female adult
coll Chaudoir (MNHN)
Copyright © Erich Kirschenhofer

Orthogonius deuvei Tian & Kirschenhofer, 2013 Holotype
Male adult
Coll. I. R. Sc. N. B./ Vietnam: Nong Nai Biosphere Res.; 11°18' N, 107°06' E/ 25.VI.-6.VII. 2012, night collecting/ Leg. J. Constant & J. Bresseel/ I.G. 32.161, deposited in Institut royal des Sciences naturelle de Belgique, Brussels, Belgium (IRSNB).
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Orthogonius duplicatus (Wiedemann, 1819) Lectotype
Male adult
Mus. Prague
Copyright © Erich Kirschenhofer

Orthogonius cf duplicatus (puncticollis)
Female adult
Pakistan (cAA). det. Anichtchenko A. 2022
Copyright © Alexander Anichtchenko

Orthogonius annamicola Tian & Deuve, 2006 Holotype
Male adult
BMNH
Copyright © Erich Kirschenhofer

Orthogonius pseudolongicornis Tian & Deuve, 2006 Paratype
Male adult
BMNH
Copyright © Erich Kirschenhofer

Orthogonius angusticollis Schmidt-Gobel, 1846 Lectotype
Male adult

Copyright © Erich Kirschenhofer

Orthogonius limbourgi Tian & Deuve, 2016
Male adult

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Orthogonius bellus Tian & Deuve, 2016 Holotype
Male adult
“S. Vietnam, 40 km NW An Khe, Buon Luoi, 620-750 m”, “14.10 N / 108.30 E, 28. III-12.IV. 1995, Pacholatko & Dembicky”, “Mus. Wien.”
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Hexachaetus vietnamensis Tian & Deuve, 2016 Holotype
Male adult
Annam , Kontum, R. P. C. Corompt, 1914”, from Central Vietnam, in MNHN
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Hexachaetus prodigus Tian & Deuve, 2006 Holotype
Female adult
Dalat , Annam, III-IV, 1924” and “R. I. SC. Nat. Belg., I. G. 16.500”, in IRSNB ; 1 female, “ Coll. I.R. Sc.N.B / Vietnam: Dong Nai Biosphere, 11°18 N, 107°06 E / 25. VI. 6. VII. 2012, nigh collecting, leg. J Constant & J. Bresseel / I. G.: 32.161”, in IRSNB
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